const a = {
  "type": "page",
  "path": "body",
  "body": [
    {
      "type": "row",
      "props": {
        "minHeight": 20
      },
      "path": "body[0]",
      "controls": [
        {
          "type": "col",
          "slot": "slotA",
          "props": {
            "span": 8
          },
          "path": "body[0].controls[0]"
        },
        {
          "type": "col",
          "props": {
            "span": 8
          },
          "path": "body[0].controls[1]"
        },
        {
          "type": "col",
          "props": {
            "span": 8
          },
          "path": "body[0].controls[2]"
        }
      ]
    },
    {
      "type": "button",
      "props": {
        "text": "按钮",
        "type": "primary"
      },
      "path": "body[1]"
    },
    {
      "type": "input",
      "props": {
        "name": "",
        "label": "字段描述"
      },
      "path": "body[2]"
    },
    {
      "type": "col",
      "props": {
        "span": 8
      },
      "path": "body[3]"
    },
    {
      "type": "row",
      "props": {
        "minHeight": 20
      },
      "path": "body[4]"
    },
    {
      "type": "filterTableFilterWrapper",
      "props": {},
      "path": "body[5]"
    }
  ]
}